The 3VA2440-6HK42-0AA0: The interrupting ratings are the headline here: 242 kA at 240 V, 187 kA at 415 V and 440 V, stepping down to 121 kA at 500 V and 13 kA at 690 V. The ETU340 release gives you adjustable N-conductor protection (OFF, 50%, 100%) and a fixed long-time delay of 1500 ms at minimum and maximum settings.
At 55 °C it derates to 388 A, at 60 °C to 380 A, at 65 °C to 368 A, and at 70 °C to 352 A. Maximum power loss is 63.3 W at rated current — worth factoring into the enclosure thermal calculation if you're stacking several of these on a bus.
The breaker measures 184 mm wide, 248 mm high, and 110 mm deep. That 110 mm depth (4.3 inches) is the projection from the mounting surface — critical when you're laying out a shallow enclosure or retrofitting into an existing panel where the deadfront clearance is tight. Width at 184 mm (7.2 inches) for a 4-pole frame is standard for this class; verify your busbar spacing and phase barriers before committing the drill pattern.